Construction device for preparing modified ardealite highway subgrade

Abstract

The invention discloses a construction device for preparing a modified ardealite highway subgrade. The construction device comprises a construction vehicle, raw material boxes arranged on the construction vehicle side by side, a material mixing mechanism arranged in the construction vehicle, a compaction mechanism arranged on the rear side of the construction vehicle and a control system in the construction vehicle. Raw material boxes on the construction vehicle are sequentially a water tank, a cement box, a modified phosphogypsum powder box, a clay powder box and a cement mortar box from the rear side to the front side. The material mixing mechanism comprises a material discharging auger assembly, a material mixing rocking hopper, a material discharging box and a humidifying spray head; the compacting mechanism comprises a dragging plate, a first pressing roller and a second pressing roller. Raw materials are dried in advance and loaded into the respective box bodies respectively, mixing in advance is not needed, raw material waste is avoided, the proportioning proportion can be adjusted at any time according to needs, the raw materials are discharged into the mixing rocking hopper according to the proportion to be shaken up, sieved and fall down, then the raw materials are laid on a road in two layers through humidification, and the raw materials are compacted step by step to reduce flying dust, so that the road quality is improved. And the raw materials absorb water and agglomerate, so that the strength of the roadbed is improved.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed paving equipment, and in particular to a construction device for preparing a modified phosphogypsum highway roadbed. Background Art

[0002] Using phosphogypsum in road construction can not only consume a large amount of phosphogypsum, but also reduce the cost of road construction and alleviate environmental pressure. The application of phosphogypsum in highway construction mainly includes use as roadbed filler and modified fly ash stabilized road base material. However, due to the water solubility of phosphogypsum itself, the strength of the base material based on phosphogypsum is difficult to form, and the water stability and anti-scouring properties are poor. Therefore, phosphogypsum needs to be mixed with other raw materials before paving to increase its paving strength. For highway paving, mixing the raw materials in advance will cause raw material accumulation, and paving equipment is also required, resulting in low paving efficiency. Paving after mixing the raw materials in advance and absorbing water will cause paving difficulties. Therefore, there is a need for a construction device that can automatically lay the roadbed while mixing the materials. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one purpose of the present invention is to provide a construction device for preparing a modified phosphogypsum highway subgrade, which solves the problems of troublesome mixing of modified phosphogypsum and low laying efficiency.

[0004] A construction device for preparing a modified phosphogypsum highway subgrade according to the present invention comprises a construction vehicle, raw material boxes arranged side by side on the construction vehicle, a mixing mechanism arranged in the construction vehicle, a compacting mechanism arranged at the rear side of the construction vehicle, and a control system in the construction vehicle; The construction vehicle is symmetrically provided with four large tires on both sides, and a pull rod is provided on the front side of the construction vehicle; The raw material boxes on the construction vehicle are, from the rear side to the front side, a water tank, a cement box, a modified phosphogypsum powder box, a clay powder box and a cement mortar box, the cement box, the modified phosphogypsum powder box and the clay powder box are of the same height, a filter is provided at the bottom of the cement box, the modified phosphogypsum powder box and the clay powder box, and a vibration motor is provided at the bottom of the cement box, the modified phosphogypsum powder box and the clay powder box; The mixing mechanism includes a discharge auger assembly, a mixing bucket, a discharge box and a humidifying nozzle. The cement box, the modified phosphogypsum powder box and the clay powder box are all provided with a conical discharge hopper at the bottom. The cement box, the modified phosphogypsum powder box and the clay powder box are respectively provided with a first discharge auger, a second discharge auger and a third discharge auger at the bottom of the conical discharge hopper. A screen is provided at the bottom of the mixing bucket. The mixing bucket is installed on a shaking structure and the shaking structure is installed at the box opening in the discharge box. The discharge ports of the first discharge auger, the second discharge auger and the third discharge auger are all downward and are all at the bucket opening of the mixing bucket. The bottom of the discharge box The front and rear sides of the part are symmetrically provided with inclined paving channels, and the two paving channels both penetrate the bottom wall of the construction vehicle. Two humidifying nozzles are symmetrically provided below the mixing bucket in the discharge box. A water supply pipe is provided on the water tank and a water pump is provided in the water supply pipe. One end of the water supply pipe is bifurcated into two branch pipes and the two branch pipes are respectively connected to the two humidifying nozzles. An initial pressure roller is provided at the bottom of the construction vehicle in the middle of the two paving channels. A cement slurry discharge pipe is provided at the bottom of the cement mortar box and a cement pump is provided in the cement slurry discharge pipe. The bottom end of the cement slurry discharge pipe is in front of the front paving channel and a paving cement slurry nozzle is provided at the bottom of the cement slurry discharge pipe. The compaction mechanism includes a drag plate, a first pressing roller and a second pressing roller. The drag plate is horizontally mounted on the rear side wall of the construction vehicle. The first pressing roller and the second pressing roller are sequentially mounted on the drag plate from front to back. The diameter of the second pressing roller is - times that of the first pressing roller. An inverted shaped frame is provided on the drag plate. One end of the inverted shaped frame is mounted on the drag plate, and the other end is located at the rear side of the second pressing roller. A spray drying box facing downward is provided on the inverted shaped frame. An L-shaped drainage pipe is provided in the inverted shaped frame. One end of the L-shaped drainage pipe is connected to a water tank with a hose, and the other end is connected to the spray drying box. A water pump is provided on the hose. The control system is used to control the operation of the mixing mechanism, the water tank water pump and the cement pump.

[0005] In some embodiments of the present invention, the discharging speeds of the first discharging auger, the second discharging auger and the third discharging auger are in a ratio of 10-15:70-80:10-15.

[0006] In other embodiments of the present invention, the tops of the cement box, modified phosphogypsum powder box, clay powder box and cement mortar box are all provided with flaps on the same side direction, the flaps on the cement box, modified phosphogypsum powder box and clay powder box are all provided with air permeable nets, and the flap on the cement mortar box is provided with exhaust holes.

[0007] In other embodiments of the present invention, the cement box, modified phosphogypsum powder box and clay powder box are equipped with electric pressure plates on the bottom side walls, and the bottoms of the cement box and water tanks are equipped with electric liquid level gauges, and the electric pressure plates and the electric liquid level gauges are electrically connected to the control system.

[0008] In some other embodiments of the present invention, the shaking structure includes two mounting slide rods, a return spring group, an eccentric wheel and a driving motor, four mounting blocks are symmetrically provided on both sides of the top wall and side walls of the mixing bucket, the mounting blocks are movably sleeved on the two mounting slide rods, the two ends of the two mounting slide rods are fixed on the inner wall of the box opening of the discharge box, a return spring group is provided between the top left wall of the mixing bucket and the inner wall of the discharge box, and an eccentric wheel is provided on the top right wall of the mixing bucket, and the eccentric wheel is installed on the rotating shaft of the driving motor.

[0009] In some other embodiments of the present invention, the top and bottom of the mixing bucket are respectively a first frame and a second frame, a conical square bucket is provided between the first frame and the second frame, and the width of the first frame is 3-5 times the width of the second frame.

[0010] In other embodiments of the present invention, the angle between the paving channel and the horizontal plane is between 60-75 degrees.

[0011] In other embodiments of the present invention, the front end of the humidifying nozzle is spherical and atomizing pores are evenly distributed in the front half of the sphere.

[0012] In some other embodiments of the present invention, the front side wall and the side walls on both sides of the construction vehicle are provided with reinforcement frames, and the tail end of the pull rod is fixed at the center position of the reinforcement frame.

[0013] In the present invention, the raw materials are dried in advance and loaded into respective boxes respectively, and there is no need to mix the materials in advance, which will not cause waste of raw materials. The proportion of ingredients can be adjusted at any time as needed. The raw materials are discharged into the mixing bucket according to the proportion to be shaken and screened and dropped. The raw materials are then humidified and laid on the road in two layers. The dust is reduced and the compaction effect is improved through step-by-step compaction. The raw materials are then exposed to water to make them absorb water and form agglomerates, thereby improving the strength of the roadbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 The present invention is a schematic structural diagram of a construction device for preparing a modified phosphogypsum highway subgrade.

[0015] Figure 2 This is a schematic cross-sectional structural diagram of the construction vehicle proposed by the present invention.

[0016] Figure 3 This is a structural schematic diagram of the installation of the second discharge auger proposed in the present invention.

[0017] Figure 4 This is a schematic structural diagram of the shaking structure proposed in the present invention.

[0018] Figure 5 This is a schematic structural diagram of the discharge box proposed in the present invention.

[0019] Figure 6 This is a schematic diagram of the structure of the humidifying nozzle proposed in the present invention.

[0020] In the figure: 1. construction vehicle; 11. pulling rod; 2. cement mortar box; 21. cement paddle pipe; 211. cement slurry nozzle; 3. clay powder box; 31. third discharging auger; 4. modified phosphogypsum powder box; 40. filter screen; 41. second discharging auger; 5. cement box; 51. first discharging auger; 6. water tank; 61. spray box; 7. first pressure roller; 71. second pressure roller; 8. discharging box; 81. humidifying nozzle; 811. atomizing pores; 82. paving channel; 9. mixing bucket; 91. conical square bucket; 92. second square frame; 93. mounting block; 94. mounting slide rod; 95. eccentric wheel; 96. return spring assembly. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] like Figure 1-6 As shown, a construction device for preparing a modified phosphogypsum highway subgrade proposed by the present invention comprises a construction vehicle 1, raw material boxes arranged side by side on the construction vehicle 1, a mixing mechanism arranged in the construction vehicle, a compacting mechanism arranged at the rear side of the construction vehicle, and a control system in the construction vehicle; The construction vehicle 1 is symmetrically provided with four large tires on both sides, and a pull rod 11 is provided on the front side of the construction vehicle 1; the front end of the pull rod 11 is mounted on a towing device, such as a tractor used for construction or a towing vehicle, through a pin or bolt; the large tires will not leave indentations or will be very small when paving the roadbed; The raw material boxes on the construction vehicle 1 are, from the rear side to the front side, a water tank 6, a cement box 5, a modified phosphogypsum powder box 4, a clay powder box 3 and a cement mortar box 2. The cement box 5, the modified phosphogypsum powder box 4 and the clay powder box 3 have the same height. A filter 40 is provided at the bottom of the cement box 5, the modified phosphogypsum powder box 4 and the clay powder box 3. A vibration motor (not shown) is provided at the bottom of the cement box 5, the modified phosphogypsum powder box 4 and the clay powder box 3 to improve the material feeding efficiency and prevent the filter from being blocked. The cement box 5 is mainly used to place dry powdered cement mixed with a small amount of steel slag powder and blast furnace slag powder, the modified phosphogypsum powder box is used to store powdered modified phosphogypsum powder, and the clay powder box is used to store powdered red clay; if it is difficult to fall naturally, start the vibration motor to help the powdered raw materials fall from the filter screen; The mixing mechanism includes a discharge auger assembly, a mixing shake bucket 9, a discharge box 8 and a humidifying nozzle 81. The cement box 5, the modified phosphogypsum powder box 4 and the clay powder box 3 are all provided with a conical discharge hopper at the bottom. The cement box 5, the modified phosphogypsum powder box 4 and the clay powder box 3 are respectively provided with a first discharge auger 51, a second discharge auger 41 and a third discharge auger 31 at the bottom of the conical discharge hopper. A screen is provided at the bottom of the mixing shake bucket 9. The mixing shake bucket 9 is installed on a shaking structure and the shaking structure is installed at the box opening of the discharge box 8. The discharge ports of the first discharge auger 51, the second discharge auger 41 and the third discharge auger 31 are all downward and are all at the bucket opening of the mixing shake bucket 9. The front and rear sides are symmetrically provided with inclined paving channels 82, and the two paving channels 82 both penetrate the bottom wall of the construction vehicle 1. Two humidifying nozzles 81 are symmetrically provided below the mixing bucket 9 in the discharge box 8. A water supply pipe is provided on the water tank 6 and a water pump is provided in the water supply pipe. One end of the water supply pipe is bifurcated into two branches and the two branches are respectively connected to the two humidifying nozzles 81. An initial pressure roller 10 is provided at the bottom of the construction vehicle 1 in the middle of the two paving channels 82. A cement slurry discharge pipe 21 is provided at the bottom of the cement mortar box 2 and a cement pump is provided in the cement slurry discharge pipe 21. The bottom end of the cement slurry discharge pipe 21 is in front of the front paving channel 82 and a paving cement slurry nozzle 211 is provided at the bottom of the cement mortar discharge pipe 21. The first discharging auger 51, the second discharging auger 41 and the third discharging auger 31 can determine the discharging speed by the rotation speed. The first discharging auger 51 and the third discharging auger 31 are smaller than the second discharging auger 41 because their discharging amount is small, and the discharging speed can be controlled, so that the discharging ratio can be accurately controlled; First, the cement slurry discharged from the cement mortar box is mixed with fine sand. After being discharged, a 1cm thick cement slurry is spread on the compacted roadbed, which is convenient for the subsequent raw material powder to be spread and adhered, and dust is not generated. It can also ensure that the bottom raw material penetrates into the cement slurry, and the bottom layer is easy to solidify and condense, and the bottom is not easy to seep water from the soil. First, half the thickness of the raw material mixed powder is laid, and then the initial pressure roller is used for simple flattening, and the subsequent ones are laid, waiting for the subsequent first pressure roller 7 and the second pressure roller 71 to perform the final flattening and compaction; another layer of cement slurry can be arranged between the two layers of raw material powder, that is, a cement slurry discharge pipe 21 and a cement slurry spray nozzle are added behind the initial pressure roller, and then the second layer of raw material powder is laid; The raw material powder is shaken and mixed in the mixing bucket 9, and sieved and mixed by the screen to achieve a certain mixing purpose but it does not need to be completely mixed, because the paving of the roadbed does not require mixing. Then water mist is sprayed, and the raw material powder will absorb a large amount of sprayed water vapor from the mixing bucket 9 and then fall down. This is to form a network structure for the cement powder. After compaction later, a certain water layer is sprayed for absorption by the roadbed. Finally, after absorbing water for 5-10 hours, it is compacted again. The roller is compacted and the present application is no longer used.

[0023] The compaction mechanism includes a drag plate, a first pressure roller 7 and a second pressure roller 71. The drag plate is horizontally mounted on the rear side wall of the construction vehicle 1. The first pressure roller 7 and the second pressure roller 71 are sequentially mounted on the drag plate from front to back. The diameter of the second pressure roller 71 is 3-5 times that of the first pressure roller. The drag plate is provided with an inverted frame, one end of which is mounted on the drag plate and the other end is located at the rear side of the second pressure roller 71 and a spray box 61 facing downward is arranged on the inverted frame. An L-shaped drainage pipe is arranged in the inverted frame. One end of the L-shaped drainage pipe is connected to the water tank 6 with a hose and the other end is connected to the spray box 61. A water pump is arranged on the hose. The control system is used to control the mixing mechanism, the water pump on the water tank 6 and the cement pump.

[0024] The first roller 7 performs surface compaction with little dust, but it is not the main compaction. The following rollers perform the final compaction, spraying water to allow the powdered raw cement to absorb water, solidify the roadbed, and then compact it, and finally lay a layer of asphalt.

[0025] The discharging speeds of the first discharging auger 51, the second discharging auger 41 and the third discharging auger 31 are in a ratio of 10-15:70-80:10-15.

[0026] Modified phosphogypsum powder accounts for 70-75% of the volume, second red clay powder accounts for about 15%, and cement accounts for about 15%. This ratio can also be adjusted according to needs.

[0027] The cement box 5, the modified phosphogypsum powder box 4, the clay powder box 3 and the cement mortar box 2 are all provided with flaps on the same side direction, and the flaps on the cement box 5, the modified phosphogypsum powder box 4 and the clay powder box 3 are all provided with air-permeable nets, and the flap on the cement mortar box 2 is provided with exhaust holes.

[0028] Put on the flip cover, the flip cover is sealed, but the breathable mesh and exhaust holes leak air, and the breathable mesh can ventilate and prevent dust from being discharged.

[0029] The cement box 5, modified phosphogypsum powder box 4 and clay powder box 3 are equipped with electric pressure plates on the bottom side walls, and the bottoms of the cement box 2 and water tank 6 are both equipped with electric liquid level gauges, and the electric pressure plates and electric liquid level gauges are both electrically connected to the control system.

[0030] When the residual powder in the cement box 5, modified phosphogypsum powder box 4 and clay powder box 3 is less than 20% and the set pressure value is close to 20%, the alarm will be triggered when the pressure value transmitted by the electronically controlled pressure plate is lower than the set value, and the same is true for cement slurry.

[0031] The shaking structure includes two mounting slide bars 94, a return spring group 96, an eccentric wheel 95 and a driving motor. Four mounting blocks 93 are symmetrically provided on both sides of the top wall and side walls of the mixing bucket 9. The mounting blocks 93 are movably sleeved on the two mounting slide bars 94. The two ends of the two mounting slide bars 94 are fixed on the inner wall of the box opening of the discharge box 8. A return spring group 96 is provided between the top left wall of the mixing bucket 9 and the inner wall of the discharge box 8. An eccentric wheel 95 is provided on the top right wall of the mixing bucket 9, and the eccentric wheel 95 is installed on the rotating shaft of the driving motor.

[0032] The eccentric wheel drives the mixing bucket to move, and the return spring group enables it to swing back and forth to mix and sieve the powder.

[0033] The top and bottom of the mixing bucket 9 are respectively the first frame and the second frame 92, and a conical square bucket 91 is arranged between the first frame and the second frame 92, and the width of the first frame is 3-5 times the width of the second frame 92. It is convenient for the powder to gather in the middle, and it is convenient to mix during screening. Since the raw materials at the falling auger are unchanged, the swinging mixing bucket is moving, so the raw materials will fall alternately in layers.

[0034] The angle between the paving channel 82 and the horizontal plane is between 60-75 degrees. To facilitate the mixed powder to fall from the paving channel, the distance between the two paving channels at the bottom is at least about 1.5 meters.

[0035] The front end of the humidifying nozzle 81 is spherical and atomizing pores 811 are evenly distributed in the front half of the sphere.

[0036] Spray water mist, scatter the powder, and the water vapor penetrates into the powder, making it absorbed faster.

[0037] The front side wall and the side walls of the construction vehicle 1 are provided with reinforcement frames, and the tail end of the pull rod 11 is fixed at the center of the reinforcement frame. The reinforcement frame can prevent the pull rod connection from being separated from the construction vehicle when pulling.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A construction device for preparing modified phosphogypsum highway subgrade, characterized in that: It comprises a construction vehicle (1), raw material boxes arranged side by side on the construction vehicle (1), a mixing mechanism arranged inside the construction vehicle, a compacting mechanism arranged at the rear side of the construction vehicle, and a control system inside the construction vehicle; The construction vehicle (1) is symmetrically provided with four large tires on both sides, and the front side of the construction vehicle (1) is provided with a pull rod (11); The raw material boxes on the construction vehicle (1) are, from the rear side to the front side, a water tank (6), a cement box (5), a modified phosphogypsum powder box (4), a clay powder box (3) and a cement mortar box (2), the cement box (5), the modified phosphogypsum powder box (4) and the clay powder box (3) being of the same height, a filter screen (40) being provided at the bottom of the cement box (5), the modified phosphogypsum powder box (4) and the clay powder box (3), and a vibration motor being provided at the bottom of each of the cement box (5), the modified phosphogypsum powder box (4) and the clay powder box (3); The mixing mechanism comprises a discharge auger assembly, a mixing hopper (9), a discharge box (8) and a humidifying nozzle (81). The cement box (5), the modified phosphogypsum powder box (4) and the clay powder box (3) are all provided with a conical discharge hopper at the bottom. The cement box (5), the modified phosphogypsum powder box (4) and the clay powder box (3) are respectively provided with a first discharge auger (51), a second discharge auger (41) and a third discharge auger (31) at the bottom of the conical discharge hopper. A screen is provided inside the bottom of the mixing hopper (9). The mixing hopper (9) is mounted on a shaking structure and the shaking structure is mounted at the box opening of the discharge box (8). The discharge openings of the first discharge auger (51), the second discharge auger (41) and the third discharge auger (31) are all downwardly facing and are all located at the hopper opening of the mixing hopper (9). The bottom of the discharge box (8) is provided with a screen. The front and rear sides of the part are symmetrically provided with inclined paving channels (82), and the two paving channels (82) both penetrate the bottom wall of the construction vehicle (1). Two humidifying nozzles (81) are symmetrically provided in the discharge box (8) below the mixing bucket (9). A water supply pipe is provided on the water tank (6), and a water pump is provided in the water supply pipe. One end of the water supply pipe is bifurcated into two branch pipes, and the two branch pipes are respectively connected to the two humidifying nozzles (81). An initial pressure roller (10) is provided at the bottom of the construction vehicle (1) in the middle of the two paving channels (82). A cement slurry discharge pipe (21) is provided at the bottom of the cement mortar box (2), and a cement pump is provided in the cement slurry discharge pipe (21). The bottom end of the cement slurry discharge pipe (21) is in front of the front paving channel (82), and a paving cement slurry nozzle (211) is provided at the bottom end of the cement slurry discharge pipe (21); The compacting mechanism comprises a pulling plate, a first pressing roller (7) and a second pressing roller (71), the pulling plate being horizontally mounted on the rear side wall of the construction vehicle (1), the pulling plate being sequentially mounted with the first pressing roller (7) and the second pressing roller (71) from front to back, the diameter of the second pressing roller (71) being 3-5 times that of the first pressing roller, the pulling plate being provided with an inverted shaped frame, one end of the inverted shaped frame being mounted on the pulling plate and the other end being located at the rear side of the second pressing roller (71) and having a spray drying box (61) facing downwards thereon, an L-shaped drainage pipe being arranged inside the inverted shaped frame, one end of the L-shaped drainage pipe being connected to the water tank (6) by a hose and the other end being connected to the spray drying box (61), and a water pump being arranged on the hose; The control system is used to control the operation of the mixing mechanism, the water pump of the water tank (6) and the cement pump.

2. A construction device for preparing a modified phosphogypsum highway subgrade according to claim 1, characterized in that: The discharging speeds of the first discharging auger (51), the second discharging auger (41) and the third discharging auger (31) are in a ratio of 10-15:70-80:10-15.

3. A construction device for preparing a modified phosphogypsum highway subgrade according to claim 1, characterized in that: The cement box (5), the modified phosphogypsum powder box (4), the clay powder box (3) and the cement mortar box (2) are all provided with flaps on the same side direction at the top, and the flaps on the cement box (5), the modified phosphogypsum powder box (4) and the clay powder box (3) are all provided with air permeable nets, and the flap on the cement mortar box (2) is provided with exhaust holes.

4. A construction device for preparing a modified phosphogypsum highway subgrade according to claim 1, characterized in that: The cement box (5), the modified phosphogypsum powder box (4) and the clay powder box (3) are provided with an electric control pressure plate on the bottom side wall, and the bottom of the cement box (2) and the water tank (6) are provided with an electric control liquid level gauge, and the electric control pressure plate and the electric control liquid level gauge are both electrically connected to the control system.

5. The construction device for preparing a modified phosphogypsum highway subgrade according to claim 1, characterized in that: The shaking structure comprises two mounting slide bars (94), a return spring group (96), an eccentric wheel (95) and a driving motor. Four mounting blocks (93) are symmetrically arranged on both sides of the top wall and side wall of the mixing bucket (9). The mounting blocks (93) are correspondingly and movably sleeved on the two mounting slide bars (94). Both ends of the two mounting slide bars (94) are fixed on the inner wall of the box opening of the discharge box (8). A return spring group (96) is arranged between the top left wall of the mixing bucket (9) and the inner wall of the discharge box (8). An eccentric wheel (95) is arranged on the top right wall of the mixing bucket (9), and the eccentric wheel (95) is mounted on the rotating shaft of the driving motor.

6. A construction device for preparing a modified phosphogypsum highway subgrade according to claim 1, characterized in that: The top and bottom of the mixing shaking bucket (9) are respectively a first square frame and a second square frame (92); a conical square bucket (91) is provided between the first square frame and the second square frame (92); and the width of the first square frame is 3 to 5 times the width of the second square frame (92).

7. A construction device for preparing a modified phosphogypsum highway subgrade according to claim 1, characterized in that: The angle between the paving channel (82) and the horizontal plane is between 60 and 75 degrees.

8. The construction device for preparing a modified phosphogypsum highway subgrade according to claim 1, characterized in that: The front end of the humidifying nozzle (81) is spherical, and atomizing pores (811) are evenly distributed on the front half of the sphere.

9. The construction device for preparing a modified phosphogypsum highway subgrade according to claim 1, characterized in that: The front side wall and the side walls on both sides of the construction vehicle (1) are provided with reinforcement frames, and the rear end of the pull rod (11) is fixed at the center position of the reinforcement frame.

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